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ACQUISTION AND DIVESTITURES - Schedule of Fair Value of the Assets and Liabilities Acquired (Details) - Moonrise Midstream, LLC - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 10, 2025 | Mar. 31, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Business Combination [Line Items] |  |  |  |
Total consideration paid for Moonrise | $ 89,771 |  |  |
Cash | 1,879 |  |  |
Accounts receivable | 3,482 |  |  |
Other current assets | 204 |  |  |
Property, plant and equipment, net | 74,496 |  |  |
Intangibles | 12,798 |  |  |
Other assets | 758 |  |  |
Trade accounts payable, accrued expenses and other | (3,846) |  |  |
Net assets acquired and liabilities assumed | 89,771 |  |  |
Equity consideration issued | $ 17,900 | $ 17,895 | $ 17,895 | $ 0
Equity consideration issued (in shares) | 462,265 |  |  |
Equity consideration issued (in dollar per share) | $ 38.71 |  |  |
Cash acquired from acquisition | $ 1,900 |  |  |

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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=smc_MoonriseMidstreamLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |